Mystery Object found on Beach!!

I found this curious object lying on the beach near to where the last image was taken. Whilst I 'captured' my image successfully, this object remains at large and is only considered a minor danger to the public.
What is it?
First 'correct' answer wins a chocolate fish. This will also give me an indication if anyone is actually looking at this blog. Quirky answers welcome!!
I will tell you what attracted me to sneak up and photograph this later....
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